189 lines
5.4 KiB
C
189 lines
5.4 KiB
C
/****************************************************************************
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* apps/system/taskset/taskset.c
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*
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* Copyright 2018 Sony Video & Sound Products Inc.
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* Author: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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#include <errno.h>
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#include "nshlib/nshlib.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: show_usage
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****************************************************************************/
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static void show_usage(FAR const char *progname, int exitcode) noreturn_function;
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static void show_usage(FAR const char *progname, int exitcode)
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{
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printf("%s mask command ... \n", progname);
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printf("%s -p [mask] pid \n", progname);
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exit(exitcode);
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}
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/****************************************************************************
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* Name: show_usage
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****************************************************************************/
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static bool get_cpuset(const char *arg, cpu_set_t *cpu_set)
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{
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DEBUGASSERT(NULL != arg);
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bool ret = false;
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int val = atoi(arg);
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if (0 < val && val < (1 << CONFIG_SMP_NCPUS))
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{
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*cpu_set = (cpu_set_t)val;
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ret = true;
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}
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else
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{
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fprintf(stderr, "invalid cpuset %s \n", arg);
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#ifdef CONFIG_BUILD_LOADABLE
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int main(int argc, FAR char *argv[])
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#else
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int taskset_main(int argc, char **argv)
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#endif
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{
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FAR char *nshargv[2];
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int exitcode;
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int option;
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int pid = -1;
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cpu_set_t cpuset;
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int rc;
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CPU_ZERO(&cpuset);
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/* Parse command line options */
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exitcode = EXIT_FAILURE;
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while ((option = getopt(argc, argv, ":p:h")) != ERROR)
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{
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switch (option)
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{
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case 'p':
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{
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pid = (int)atoi(argv[argc -1]);
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}
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break;
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case 'h':
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exitcode = EXIT_SUCCESS;
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goto errout_with_usage;
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}
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}
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if (-1 != pid)
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{
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if (4 == argc)
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{
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if (!get_cpuset(argv[2], &cpuset))
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{
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goto errout;
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}
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rc = sched_setaffinity(pid, sizeof(cpu_set_t), &cpuset);
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if (-1 == rc)
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{
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fprintf(stderr, "Err in sched_setaffinity() errno=%d \n", errno);
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goto errout;
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}
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}
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rc = sched_getaffinity(pid, sizeof(cpu_set_t), &cpuset);
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if (-1 == rc)
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{
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fprintf(stderr, "Err in sched_getaffinity() errno=%d \n", errno);
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goto errout;
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}
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printf("pid %d's current affinity mask: %x \n", pid, cpuset);
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}
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else
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{
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if (3 <= argc)
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{
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if (!get_cpuset(argv[1], &cpuset))
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{
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goto errout;
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}
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nshargv[0] = argv[2];
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nshargv[1] = NULL;
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sched_setaffinity(getpid(), sizeof(cpu_set_t), &cpuset);
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usleep(10 * 1000);
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pid = task_create("system", CONFIG_SYSTEM_TASKSET_PRIORITY,
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CONFIG_SYSTEM_TASKSET_STACKSIZE, nsh_system,
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(FAR char * const *)nshargv);
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(void)waitpid(pid, &rc, 0);
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}
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}
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errout:
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return EXIT_SUCCESS;
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errout_with_usage:
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show_usage(argv[0], exitcode);
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return exitcode; /* Not reachable */
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}
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